voirs-spatial 0.1.0-rc.1

//! TelepresenceProcessor implementation and processing logic

use super::audio::{AudioMetadata, ReceivedAudio};
use super::quality::QualitySettings;
use super::security::SecuritySettings;
use super::session::{
    SessionCapabilities, SessionConfig, SessionJoinResult, SessionStatistics, UserConfig,
};
use super::spatial::SpatialAudioStats;
use super::types::*;
use crate::{Position3D, Result};
use serde::{Deserialize, Serialize};
use std::collections::HashMap;
use std::sync::{Arc, RwLock};
use std::time::{SystemTime, UNIX_EPOCH};

/// Main telepresence processor
pub struct TelepresenceProcessor {
    /// Configuration
    config: TelepresenceConfig,

    /// Active sessions
    sessions: Arc<RwLock<HashMap<String, Box<dyn super::session::TelepresenceSession>>>>,

    /// Audio processing pipeline
    audio_pipeline: AudioProcessingPipeline,

    /// Spatial processing
    spatial_processor: SpatialProcessingPipeline,

    /// Network manager
    network_manager: NetworkManager,

    /// Quality manager
    quality_manager: QualityManager,

    /// Statistics collector
    stats_collector: StatisticsCollector,
}

/// Telepresence configuration
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct TelepresenceConfig {
    /// Default user configuration
    pub default_user_config: UserConfig,

    /// Session limits
    pub session_limits: SessionLimits,

    /// Global audio settings
    pub global_audio_settings: GlobalAudioSettings,

    /// Resource limits
    pub resource_limits: ResourceLimits,

    /// Security settings
    pub security_settings: SecuritySettings,
}

/// Session limits
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct SessionLimits {
    /// Maximum concurrent sessions
    pub max_sessions: usize,

    /// Maximum users per session
    pub max_users_per_session: usize,

    /// Maximum session duration (minutes)
    pub max_session_duration: u32,

    /// Session timeout (minutes)
    pub session_timeout: u32,
}

/// Global audio settings
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct GlobalAudioSettings {
    /// Global sample rate
    pub sample_rate: u32,

    /// Global buffer size
    pub buffer_size: usize,

    /// Global quality level
    pub quality_level: QualityLevel,

    /// Default codec
    pub default_codec: AudioCodec,
}

/// Resource limits
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct ResourceLimits {
    /// Maximum CPU usage (%)
    pub max_cpu_usage: f32,

    /// Maximum memory usage (MB)
    pub max_memory_usage: u64,

    /// Maximum bandwidth per user (kbps)
    pub max_bandwidth_per_user: u32,

    /// Maximum concurrent audio streams
    pub max_audio_streams: usize,
}

// Helper structs for internal processing

/// Audio processing pipeline for telepresence
pub struct AudioProcessingPipeline {
    // Audio processing components would be implemented here
}

/// Spatial processing pipeline for 3D audio positioning
pub struct SpatialProcessingPipeline {
    // Spatial processing components would be implemented here
}

/// Network manager for handling connections and data transfer
pub struct NetworkManager {
    // Network management components would be implemented here
}

/// Quality manager for adaptive quality control
pub struct QualityManager {
    // Quality management components would be implemented here
}

/// Statistics collector for performance metrics
pub struct StatisticsCollector {
    // Statistics collection components would be implemented here
}

// Implementation of main processor

impl TelepresenceProcessor {
    /// Create new telepresence processor
    pub fn new(config: TelepresenceConfig) -> Self {
        Self {
            config,
            sessions: Arc::new(RwLock::new(HashMap::new())),
            audio_pipeline: AudioProcessingPipeline::new(),
            spatial_processor: SpatialProcessingPipeline::new(),
            network_manager: NetworkManager::new(),
            quality_manager: QualityManager::new(),
            stats_collector: StatisticsCollector::new(),
        }
    }

    /// Create new telepresence session
    pub fn create_session(&mut self, session_config: &SessionConfig) -> Result<String> {
        let session_id = generate_session_id();
        // Session creation logic would be implemented here
        Ok(session_id)
    }

    /// Join existing session
    pub fn join_session(
        &mut self,
        session_id: &str,
        user_config: &UserConfig,
    ) -> Result<SessionJoinResult> {
        // Session join logic would be implemented here
        Ok(SessionJoinResult {
            success: true,
            session_id: session_id.to_string(),
            user_session_id: "user_session_123".to_string(),
            assigned_position: Some(Position3D {
                x: 0.0,
                y: 0.0,
                z: 0.0,
            }),
            capabilities: SessionCapabilities {
                max_users: 32,
                supported_codecs: vec![AudioCodec::Opus, AudioCodec::AAC],
                quality_levels: vec![QualityLevel::Medium, QualityLevel::High],
                spatial_audio: true,
                recording_capable: false,
                screen_sharing: false,
            },
            other_users: vec![],
            error_message: None,
        })
    }

    /// Leave session
    pub fn leave_session(&mut self, session_id: &str, user_id: &str) -> Result<()> {
        // Session leave logic would be implemented here
        Ok(())
    }

    /// Process audio frame for telepresence
    pub fn process_audio_frame(
        &mut self,
        session_id: &str,
        user_id: &str,
        audio_samples: &[f32],
        metadata: &AudioMetadata,
    ) -> Result<Vec<ReceivedAudio>> {
        // Audio processing logic would be implemented here
        Ok(vec![])
    }

    /// Update user position in session
    pub fn update_user_position(
        &mut self,
        session_id: &str,
        user_id: &str,
        position: Position3D,
        orientation: Orientation,
    ) -> Result<()> {
        // Position update logic would be implemented here
        Ok(())
    }

    /// Get session statistics
    pub fn get_session_stats(&self, session_id: &str) -> Result<SessionStatistics> {
        // Statistics retrieval logic would be implemented here
        Ok(SessionStatistics {
            data_sent: 0,
            data_received: 0,
            packets_sent: 0,
            packets_received: 0,
            packets_lost: 0,
            avg_latency: 0.0,
            peak_latency: 0.0,
            audio_quality_stats: super::audio::AudioQualityStats {
                avg_quality: 0.8,
                min_quality: 0.6,
                max_quality: 1.0,
                adaptations: 0,
                dropouts: 0,
                compression_ratio: 4.0,
            },
            spatial_stats: SpatialAudioStats {
                position_updates: 0,
                spatial_accuracy: 0.95,
                hrtf_efficiency: 0.9,
                room_sim_performance: 0.85,
                distance_calculations: 0,
            },
            performance_stats: super::quality::PerformanceStats {
                avg_cpu_usage: 15.0,
                peak_cpu_usage: 25.0,
                avg_memory_usage: 256.0,
                peak_memory_usage: 512.0,
                audio_processing_time: 5.0,
                network_processing_time: 2.0,
            },
        })
    }

    /// Update configuration
    pub fn update_config(&mut self, config: TelepresenceConfig) {
        self.config = config;
    }
}

// Implementation placeholders for internal components

impl AudioProcessingPipeline {
    fn new() -> Self {
        Self {
            // Initialize audio processing components
        }
    }
}

impl SpatialProcessingPipeline {
    fn new() -> Self {
        Self {
            // Initialize spatial processing components
        }
    }
}

impl NetworkManager {
    fn new() -> Self {
        Self {
            // Initialize network management components
        }
    }
}

impl QualityManager {
    fn new() -> Self {
        Self {
            // Initialize quality management components
        }
    }
}

impl StatisticsCollector {
    fn new() -> Self {
        Self {
            // Initialize statistics collection components
        }
    }
}

// Utility functions

fn generate_session_id() -> String {
    // Generate unique session ID
    format!(
        "session_{}",
        SystemTime::now()
            .duration_since(UNIX_EPOCH)
            .expect("SystemTime should be after UNIX_EPOCH")
            .as_millis()
    )
}

// Default implementations

impl Default for TelepresenceConfig {
    fn default() -> Self {
        Self {
            default_user_config: UserConfig::default(),
            session_limits: SessionLimits::default(),
            global_audio_settings: GlobalAudioSettings::default(),
            resource_limits: ResourceLimits::default(),
            security_settings: SecuritySettings::default(),
        }
    }
}

impl Default for SessionLimits {
    fn default() -> Self {
        Self {
            max_sessions: 100,
            max_users_per_session: 32,
            max_session_duration: 480, // 8 hours
            session_timeout: 30,       // 30 minutes
        }
    }
}

impl Default for GlobalAudioSettings {
    fn default() -> Self {
        Self {
            sample_rate: 48000,
            buffer_size: 1024,
            quality_level: QualityLevel::High,
            default_codec: AudioCodec::Opus,
        }
    }
}

impl Default for ResourceLimits {
    fn default() -> Self {
        Self {
            max_cpu_usage: 80.0,         // 80%
            max_memory_usage: 2048,      // 2 GB
            max_bandwidth_per_user: 320, // 320 kbps
            max_audio_streams: 64,
        }
    }
}